Method signature

datafusion/expr/src/udf.rs:215–217

Returns this function's [`Signature`] (what input types are accepted). See [`ScalarUDFImpl::signature`] for more details.

(&self)

    ///
    /// See [`ScalarUDFImpl::signature`] for more details.
    pub fn signature(&self) -> &Signature {
        self.inner.signature()
    }

    /// The datatype this function returns given the input argument types.
    /// This function is used when the input arguments are [`DataType`]s.